# Commission Regulation (EU) No 965/2012 of 5 October 2012 laying down technical requirements and administrative procedures related to air operations pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council, Division (b): Helicopters operated under VMC at night, or when the visibility is less than 1 500 m, or in conditions where the helicopter cannot be maintained in a desired flight path without reference to one or more additional instruments, shall be, in addition to (a), equipped with:

Extent: E+W+S+N.I.

(1) a means of measuring and displaying the following:
(i) attitude;
(ii) vertical speed; and
(iii) stabilised heading; and
(2) a means of indicating when the supply of power to the gyroscopic instruments is not adequate.

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Source: https://www.legislation.gov.uk/eur/2012/965/annex/VII/division/subpart+d/division/section+2/division/ncoideh120/division/b (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-965/annex-VII/division-subpart+d/division-section+2/division-ncoideh120/division-b
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.